The Earth X Saga revealed secrets of the Marvel Universe, but what were the secrets of the Earth X Saga? See for yourself in more than one hundred pages of sketches, background notes and incredible insights! Plus: The story behind Nighthawk's demonic visions starts here! Featuring Daredevil and Mephisto! Collecting Earth X #1/2, NIGHTHAWK #1-3, plus more than 100 pages of background and sketch material.